Planetopia Project STEM Challenges engage your students in brain-busting work disguised as fun! The basic premise: Students work in partners or groups against criteria & constraints lists to design and build various items for the fictional planet, Planetopia. Challenges include extension opportunities on topics including: landforms, plate tectonics, the water cycle, weather, natural disasters, plant parts, plant cells, animal cells, life cycles, heredity, genetics and more!Modification sugg